88 Acura Legend Battery Drain

I think you might be better using an ammeter connected the way you described.
As long as there’s any form of connection or power usage, a voltmeter will show a reading.
Things like the memory’s of the different computers, clock and radio are always using some form of power.
All of these different memory’s shouldn’t add up too anymore then about .025 of an amp, at the very most.
With the ammeter connected, start over again, disconnecting anything/everything you can get too, until you see an amperage drop.
While doing this remember that if a door is open; you might be turning on things; interior/dome light for one example.
On some vehicles, you have to wait a number of minutes after turning the ignition off or closing doors for the different devices to go to sleep.
In other words, the internal timer of a control module may take up to 20 minutes to completely shut down.
So don’t be too quick to condemn something, after pulling a fuse or disconnecting a unit.

Once you find a suspicious circuit(s) that might be causing the problem; you’ll have too read up on their principles of operation.
Confirming how long they should or shouldn’t be drawing current.

It’s too bad that we can’t see electricity or current flow, like coolant or oil leaks; it would make life so much easier. LOL


Dan.